diff --git a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/uri/UriTemplate.kt b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/uri/UriTemplate.kt
index 6208bcf..c3c5d93 100644
--- a/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/uri/UriTemplate.kt
+++ b/app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/uri/UriTemplate.kt
@@ -32,7 +32,7 @@ class UriTemplate private constructor(val template: String) {
                ?.let { variableBuilder?.append(it) }
                ?: error("Only letters are allowed as template", index + 1)
 
-            else -> patternBuilder.append(char)
+            else -> patternBuilder.append(Pattern.quote(char.toString()))
          }
       }